Correct Option
The correct option is (c) 2 and 3 only.
Explanation
A sporangium (plural: sporangia) is a specialized enclosure or structure within which spores are formed and stored. It is a fundamental component of the reproductive phase in various organisms, including plants and fungi.
Statement-wise Analysis
- Statement 1 is Incorrect. The sporangium is not found exclusively in flowering plants (angiosperms). It is a characteristic structure in many non-flowering groups, including:
- Fungi: For example, in Rhizopus (bread mould), sporangia develop at the tips of hyphae.
- Pteridophytes: Ferns possess sporangia on the underside of their leaves (sporophylls).
- Bryophytes: Mosses develop a capsule (sporangium) that produces spores.
- Gymnosperms and Angiosperms: While present (as microsporangia and megasporangia), they are not the sole possessors of this structure.
- Statement 2 is Correct. By definition, a sporangium is a vessel or receptacle that contains spores. Inside the sporangium, cells undergo division (often meiosis) to produce haploid spores.
- Statement 3 is Correct. The sporangium is a reproductive structure. Its primary function is the production and release of spores, which can germinate to produce new individuals (in fungi/lower plants) or gametophytes (in higher plants), thereby facilitating reproduction and dispersal.
Key Takeaway
Sporangia are spore-producing structures found across a wide range of organisms, including fungi, algae, mosses, ferns, and seed plants, serving as a mechanism for reproduction and survival under unfavorable conditions.